Surgical instrument



1,536,195 L. A. DOUGLAS SURGICAL INSTRUMENT Filed FeB. 28, 192i V///////////////7 I l k Patented May 5, 1925,

5 Leon A, onates, or wmnson, onranro, cAnAnAL PATENroF SURGICAL INSTRUMENT.

Application filed February 28, 1921. semi No. 443,532.

To all whom it may concern: I

Be it known that I, LEON A. DOUGLAS, a subject of the Kingtof Great Britain and Ireland-residing at "Windsor, in the Province of Ontario and Dominion of Canada, have invented certaiirnew and usefulIm- ,provements in Surgical Instruments, of"- which the following is a specification, ref

erence being had therein to the accompanying drawings.-

Thelinvention relates to surgical instruments of that type used for the removal of i the tonsils, andthe, invention consists in various features of construction as :hereinafter setforth. I In the drawings p Figure 1 is a plan viewof the instrument; l

Figure 2 is a side elevation thereof; Figure 3 is an enlarged longitudinal section showing the instrument asin use;

Figure 4 is a plan view of Figure 3; vi Figure 5 is a cross-section on line 5--5of Figure 2. I j j In the present state of the art tonsil-removing instruments have been devised comprising a clamp for squeezing the flesh adj acent to the portion which is to be severed, thereby preventing hemorrhage, and a knife slidable adjacent to said clamp for effecting the severing. It is, however, usual to have the knifearranged to sever by a movement in a direction away from the operator and there is therefore always danger of cutting too far. One of the features of my improvement is in the arrangement of knife which is moved in a direction toward the operator during the severing operation, thereby avoiding all possible danger of cutting any part other than the part which it v is desired to remove.

For holding the instrument during the clamping and severing action, it is desirable to provide a handle to be grasped by the surgeon, but where thetonsils on each side of the mouth are to be removed, the

engaged from" or attached to the instrument.

In detail,lA is a bar or strip for insertion into the mouth and having at its inner end an aperture B therethrough bounded on its inner side of the segmental clamping jaw C. D is a cooperating clampingjaw having a, parallel segmental r face,,said jaw being slidably engaged with guide-ways E upon opposite sides of the member A. Intermediate the members 1) and A is a flat shank F, which at itsinner end is apertured in registration with the aperture B, as indicated at G. The portion of the member F on the inner side of said aperture formswa vknife having its cutting edge facingoutward, said portion being of segmental form forIregistering with the segmentaljaw member C, as indicated at H. The members A,D and F extend outward parallel to eachother and the member F is provided with laterally ex tending finger pieces I, which may, be grasped to draw said member outward and to cause the severingby the bladeH. The member has at its outer enda laterally projecting lug J, on ,which; is ,mounted a rotary cam K forengagement with a cooperating bearing L on the member A, the arrangement being such that by, rotating said cama powerful squeezing movementof the jaws G and D towards each other is effected.

M is a winged handle for rotating the gaged by merely moving it laterally upon the wedge over the small end thereof, and it is then locked by a catch P which is pivoted at Q, and has a spring R for forcing the hooked end P thereof into engagement with the lug O. This catch is located in a groove in the handle and may be released by pulling downward thehook so as to permit the handle to be detached.

In operation, the instrument is first adjusted into position, where the jaw D is retracted and the severing blade H isforward in registration with the jaw segment 0. In this position the tonsil may be passed through the aperture B, after which the jaw D is moved in a direction away from the operator and-clamped by the operation of the cam K. The finger pieces I may then be grasped and by pulling thereonin a direction toward the operator the blade FICE.

H will be moved forward, severing the protruding portion of the tonsil.v if the operation is to be performed on both sides of the mouth, the handle N may be detached and another instrument used" in the manner just described. Finally the clamp; is released by the reverse rotation of the handle M and this permits removal lt ronr the mouth.

What; 1.0111111]: as my inventionis l. A surgicalg instr nnent comprising a memberfori insertion in the mouth, coop- F crating.- clam-ping and severing. members sociatedji there-With, a: handle forsupporting saidl members and a detachable engage ment. between said: handle and first-mentli one'dr member comprising; a- Wedge-shapet'l member on. oneengageable with the other which has a correspondingly shaped recess in the other, and a pivoted catch for holdi-ngg said? members in engagement.

2 surgical" instrument comprising a member for insertion in themouth, coop crating clamping-and severing members as sociated' therewitl j, a wedgeshaped lug depending from the first mentioned memher, a removablehandle having sliding engagement with the said lug, ands-pring influeneed' means for retaining saidhandle in posit-ion upon the" lu 3: surgicalinstrument having a 1nemher with a wedgee'shaped lug depending therefrom; a removable handle "havingslid ingfengagement with said; lug, and pivoted spring influence means for retaining said handle in position upon the lug.

4. A surgical instrument comprising an operating portion a handle for supporting said portion, and a detachable engagement between said handle and said operating portion comprising. a wedge-shaped member on one and the other having a correspondingly shaped recess,- anda pivotedcateh :tor holding said members in engagement.

5; A surgical instrument comprising; an operating portion, a handle for supporting said portion, and a detachable engagement between said handle and said operating portion comprising a Wedge-shaped member on one and the other having a: correspondingly shaped recess,- and a pivoted catch for holding said members in engagement.

surgical instrument comprising an o 'ierati-ng: portion, a handle for supporting said portion, and a detachable engagement between said-handle and saidoperating portion, comprising a Wedge-shaped member on one and the other havinga correspondingly shaped recess and a groove in one 01" its sides, and a catch pivotally mounted in said groove for holding said members in engagement.

In testimony whereof I aflix my signs!" ture.-

LEON A. DOUGLAS 

